is 2 4002079427 - 1
has 1204745953 decimal digits
takes 1,004,040.204 GHz-days to do one PRP test
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2710.119554.9296%----0.119554.9296%
Target292250,613.255765.2174%200000009600000000197,146.23064.2362%447,759.486366.6908%
Difference-21-250,613.1363-10.2878%-20000000-9600000000-197,146.2306-4.2362%-447,759.3668-11.7613%

Known prime factors (6 factors, 304.9 bits, 0.00000762% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40020794271920998124971237.48324
23 × 3
2012-08-20884.836e-120.00290.0059
400207942714727652291371340.422184
23 × 23
2019-06-288235.263e-110.00320.0059
400207942724012476562011341.127300
22 × 3 × 52
2019-06-2825251.255e-100.00910.0185
400207942796299956170598971653.0961203124
22 × 13 × 17 × 1361
2019-06-281713614.740e-70.03280.0504
400207942747772936179362669511962.051596851425
32 × 52 × 1327 × 1999
2019-12-23132719990.00040.49600.9824
400207942719721478723493510823832270.740246390396333
3 × 1319 × 1439 × 43271
2022-12-121439432710.10711.35261.6019

57 Composite Factors:
P-1 results:
No P-1 results for M4002079427


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2019-06-2823723837.483122.61427e-13236,4455.59947e-13
2019-06-2824024140.422131.60342e-11236,4453.43434e-11
2019-06-2824124241.127135.22853e-11236,4451.11989e-10
2019-06-2825325453.096161.74184e-7236,4453.73083e-7
2019-12-23slaurpalvi2-rtx2126462.051190.001220,7810.002
Missing TF 64 - 65
Missing TF 65 - 66
Missing TF 66 - 67
Missing TF 67 - 68
2022-12-12slaurpalvi2-rtx26827170.740220.1052,041,4100.214


ECM factoring results:
No ECM results for M4002079427


Lucas-Lehmer results:
No L-L results for M4002079427


PRP results:
No PRP results for M4002079427


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
TF factor-bounds graph:
271
264
254
242
241
238
this exponent TF target: 92
250
260
270
280
290
2100
Last modified: 2023-07-11T14:45:05+00:00